/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.mybatis.generator.plugins;

import java.util.List;

import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.InnerClass;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.codegen.ibatis2.Ibatis2FormattingUtilities;

/**
 * This plugin demonstrates adding methods to the example class to enable
 * case-insensitive LIKE searches. It shows hows to construct new methods and
 * add them to an existing class.
 * 
 * This plugin only adds methods for String fields mapped to a JDBC character
 * type (CHAR, VARCHAR, etc.)
 * 
 * @author Jeff Butler
 * 
 */
public class CaseInsensitiveLikePlugin extends PluginAdapter {

	/**
     * 
     */
	public CaseInsensitiveLikePlugin() {
		super();
	}

	public boolean validate(List<String> warnings) {
		return true;
	}

	@Override
	public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {

		InnerClass criteria = null;
		// first, find the Criteria inner class
		for (InnerClass innerClass : topLevelClass.getInnerClasses()) {
			if ("Criteria".equals(innerClass.getType().getShortName())) { //$NON-NLS-1$
				criteria = innerClass;
				break;
			}
		}

		if (criteria == null) {
			// can't find the inner class for some reason, bail out.
			return true;
		}

		for (IntrospectedColumn introspectedColumn : introspectedTable.getNonBLOBColumns()) {
			if (!introspectedColumn.isJdbcCharacterColumn() || !introspectedColumn.isStringColumn()) {
				continue;
			}

			Method method = new Method();
			method.setVisibility(JavaVisibility.PUBLIC);
			method.addParameter(new Parameter(introspectedColumn.getFullyQualifiedJavaType(), "value")); //$NON-NLS-1$

			StringBuilder sb = new StringBuilder();
			sb.append(introspectedColumn.getJavaProperty());
			sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
			sb.insert(0, "and"); //$NON-NLS-1$
			sb.append("LikeInsensitive"); //$NON-NLS-1$
			method.setName(sb.toString());
			method.setReturnType(FullyQualifiedJavaType.getCriteriaInstance());

			sb.setLength(0);
			sb.append("addCriterion(\"upper("); //$NON-NLS-1$
			sb.append(Ibatis2FormattingUtilities.getAliasedActualColumnName(introspectedColumn));
			sb.append(") like\", value.toUpperCase(), \""); //$NON-NLS-1$
			sb.append(introspectedColumn.getJavaProperty());
			sb.append("\");"); //$NON-NLS-1$
			method.addBodyLine(sb.toString());
			method.addBodyLine("return this;"); //$NON-NLS-1$

			criteria.addMethod(method);
		}

		return true;
	}
}
